show payment method if certain product in basket

<?php
/**
 * @package	HikaShop for Joomla!
 * @version	2.1.0
 * @author	hikashop.com
 * @copyright	(C) 2010-2012 HIKARI SOFTWARE. All rights reserved.
 * @license	GNU/GPLv3 http://www.gnu.org/licenses/gpl-3.0.html
 */
defined('_JEXEC') or die('Restricted access');
?><?php
class plgHikashoppaymentPaypal extends JPlugin
{
	var $accepted_currencies = array(
		'AUD','CAD','EUR','GBP','JPY','USD','NZD','CHF','HKD','SGD',
		'SEK','DKK','PLN','NOK','HUF','CZK','MXN','BRL','MYR','PHP',
		'TWD','THB','ILS','TRY'
	);
	var $debugData = array();
	function onPaymentDisplay(&$order,&$methods,&$usable_methods){
		if(!empty($methods)){
			foreach($methods as $method){
			if($method->payment_type!='paypal' || !$method->enabled){
				continue;
			}

			if(!empty($method->payment_zone_namekey)){
				$zoneClass=hikashop_get('class.zone');
					$zones = $zoneClass->getOrderZones($order);
				if(!in_array($method->payment_zone_namekey,$zones)){
					return true;
				}
			}

			$currencyClass = hikashop_get('class.currency');
			$null=null;
			if(!empty($order->total)){
				$currency_id = intval(@$order->total->prices[0]->price_currency_id);
				$currency = $currencyClass->getCurrencies($currency_id,$null);
				if(!empty($currency) && !in_array(@$currency[$currency_id]->currency_code,$this->accepted_currencies)){
					return true;
				}
			}


	$show = 0;
       $pIds = array('1','8','9','6','13','16','121','125','129','131','133','151','152','153','154','155','156','158');


		foreach($order->products as $product){
			if(in_array($product->product_id, $pIds))
				$show = 1;
		}
		

		if($show == 1)

			$usable_methods[$method->ordering]=$method;
			}
		}
		return true;
	}

	function onPaymentSave(&$cart,&$rates,&$payment_id){
		$usable = array();
		$this->onPaymentDisplay($cart,$rates,$usable);
		$payment_id = (int) $payment_id;
		foreach($usable as $usable_method){
			if($usable_method->payment_id==$payment_id){
				return $usable_method;
			}
		}

		return false;
	}

$show = 0;
       $pIds = array('1','8','9','6','13','16','121','125','129','131','133','151','152','153','154','155','156','158');


		foreach($order->products as $product){
			if(in_array($product->product_id, $pIds))
				$show = 1;
		}
		

		if($show == 1)